# str5 = "hello world !!!"
# print(str5.split())
# str6 = "apple,banana,cherry"
# fruits = str6.split(",")
# fruits_01 = str6.split("-")
# print(fruits)
# print(fruits_01)
# str6 = "apple,banana,cherry"
# fruits = str6.split(",",1)
# print(fruits)
# res = "-".join(str5)
# print(res)
# print("-".join(str5))

# str_1 = "abc def abc ghi"
# str_2 = str_1.replace("abc","123",1)
# print(str_2)

# str_3 = "   aaa123bbbaaa   "
# print(str_3)
# print(str_3.strip())
# print(str_3.strip(" a") + "...111")
# str_4 = "aaa123bbbaaa"
# print(str_4)
# print(str_4.strip("a"))

# str_5 = "wqferqhgeq____AFDSEEQAGA"
# print(str_5.upper())
# print(str_5.lower())
#
# print(str_5.isalnum())
# str_6 = "wqferqhqeq1564AFDSEEQAGA"
# print(str_6.isalnum())